'use strict'
Object.defineProperty(exports, '__esModule', { value: true })
exports.pageScrollMixin = void 0
function getCurrentPage() {
  var pages = getCurrentPages()
  return pages[pages.length - 1] || {}
}
function onPageScroll(event) {
  var _a = getCurrentPage().vanPageScroller
  var vanPageScroller = _a === void 0 ? [] : _a
  vanPageScroller.forEach(function(scroller) {
    if (typeof scroller === 'function') {
      scroller(event)
    }
  })
}
exports.pageScrollMixin = function(scroller) {
  return Behavior({
    attached: function() {
      var page = getCurrentPage()
      if (Array.isArray(page.vanPageScroller)) {
        page.vanPageScroller.push(scroller.bind(this))
      } else {
        page.vanPageScroller =
          typeof page.onPageScroll === 'function'
            ? [page.onPageScroll.bind(page), scroller.bind(this)]
            : [scroller.bind(this)]
      }
      page.onPageScroll = onPageScroll
    },
    detached: function() {
      var page = getCurrentPage()
      page.vanPageScroller = (page.vanPageScroller || []).filter(function(
        item
      ) {
        return item !== scroller
      })
    }
  })
}
